| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for [adv] a [adj] period | 17 |
|
| 2 | for [adv] a [adj] period | 17 |
|
| 3 | for [adv] a [adj] period | 17 |
|
| 4 | for only a [adj] period | 14 |
|
| 5 | for only a [adj] period | 14 |
|
| 6 | for [adv] a short period | 8 |
|
| 7 | for [adv] a short period | 8 |
|
